/***************************************************************************
 * Copyright 2012-2013 TXT e-solutions SpA
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 * This work was performed within the IoT_at_Work Project
 * and partially funded by the European Commission's
 * 7th Framework Programme under the contract ICT-257367.
 *
 * Authors:
 *      Salvatore Piccione (TXT e-solutions SpA)
 *
 * Contributors:
 *        Domenico Rotondi (TXT e-solutions SpA)
 **************************************************************************/
package it.txt.ens.core.util.parser;

import it.txt.ens.core.ENSResource;
import it.txt.ens.core.factory.ENSResourceFactory;
import it.txt.ens.core.factory.URIBuildingException;
import it.txt.ens.core.factory.URIParseException;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @author Salvatore Piccione (TXT e-solutions SpA - salvatore.piccione AT txtgroup.com)
 * @author Domenico Rotondi (TXT e-solutions SpA - domenico.rotondi AT txtgroup.com)
 *
 */
public class ENSResourceMapParser {
    public static ENSResource parse (ENSResourceFactory factory, Map<?,?> propertyMap) 
            throws ParseException, IllegalArgumentException{
        if (factory == null)
            throw new IllegalArgumentException("The factory cannot be null");
        if (propertyMap == null)
            throw new IllegalArgumentException("The property container cannot be null");
        if (propertyMap.isEmpty())
            throw new IllegalArgumentException("The property container cannot be empty");
        //property retrieval
        List<String> missingProperties = new ArrayList<String>(4);
        try {
            String uriSTR;
            if ((uriSTR = (String)propertyMap.get(ENSResourceFactory.URI)) == null) {

                String host;
                if ((host = (String) propertyMap.get(ENSResourceFactory.HOST)) == null)
                    missingProperties.add(ENSResourceFactory.HOST);
                String namespace;
                if ((namespace = (String) propertyMap.get(ENSResourceFactory.NAMESPACE)) == null)
                    missingProperties.add(ENSResourceFactory.NAMESPACE);
                String pattern;
                if ((pattern = (String) propertyMap.get(ENSResourceFactory.PATTERN)) == null)
                    missingProperties.add(pattern);
                
                if (missingProperties.size() > 0)
                    throw new ParseException(missingProperties);
                
                String path;
                if ((path = (String) propertyMap.get(ENSResourceFactory.PATH)) == null)
                    try {
                        return factory.create(host, namespace, pattern);
                    } catch (IllegalArgumentException e) {
                        throw new ParseException("An error occurred while parsing the given map", e);
                    } catch (URIBuildingException e) {
                        throw new ParseException("An error occurred while parsing the given map", e);
                    }
                else
                    try {
                        return factory.create(host, path, namespace, pattern);
                    } catch (IllegalArgumentException e) {
                        throw new ParseException("An error occurred while parsing the given map", e);
                    } catch (URIBuildingException e) {
                        throw new ParseException("An error occurred while parsing the given map", e);
                    }
            } else {
                try {
                    return factory.create(new URI(uriSTR));
                } catch (IllegalArgumentException e) {
                    throw new ParseException("An error occurred while parsing the given map", e);
                } catch (URISyntaxException e) {
                    throw new ParseException("An error occurred while parsing the given map", e);
                } catch (URIParseException e) {
                    throw new ParseException("An error occurred while parsing the given map", e);
                }
            }
        } catch (ClassCastException e) {
            throw new ParseException("An error occurred while casting a property to a String", e);
        }
    }
}
